LIN COMMUNICATION SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 1D, 1F, D6, and D7 instrument panel junction block assembly connectors.

      A017CE6E06

    2. Measure the voltage and resistance between the wire harness side connectors and body ground.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition

      1D-10 (BECU)*1- Body ground

      		 W - Body ground Battery power supply Always 11 to 14 V

      D7-6 (AM1)*2- Body ground

      		 GR - Body ground Battery power supply Always 11 to 14 V

      D6-1 (AM2)*2- Body ground

      		 G - Body ground Battery power supply Always 11 to 14 V
      1F-10 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω

      Tech Tips


      • If the result is not as specified, there may be a malfunction on the wire harness side.

      • *1: w/o Smart Entry and Start System

      • *2: w/ Smart Entry and Start System

    3. Reconnect the 1D,1F, D6, and D7 instrument panel junction block assembly connectors.

    4. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition

      1E-7 (LIN1)*2- 1F-10 (GND1)

      		 R - W-B LIN Communication line Ignition switch on (IG) Pulse generation
      D8-10 (LIN2) - 1F-10 (GND1) P - W-B LIN Communication line Ignition switch on (IG) Pulse generation

      Tech Tips


      • If the result is not as specified, the main body ECU (Instrument panel junction block assembly) may be malfunctioning.

      • *2: w/ Smart Entry and Start System

  2. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Side)

    A017FFZE15

    1. Disconnect the H1*1or G10*2motor connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      for LHD:
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      H1-2 (B) - H1-1 (E) SB - W-B Battery power supply Always 11 to 14 V
      H1-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD:
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      G10-2 (B) - G10-1 (E) SB - W-B Battery power supply Always 11 to 14 V
      G10-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

      Tech Tips

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the H1*1or G10*2motor connector.

    4. Measure the pulse according to the value(s) in the table below.

      for LHD:
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      H1-9 (LIN) - H1-1 (E) P - W-B LIN Communication line Ignition switch on (IG) Pulse generation
      for RHD:
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      G10-9 (LIN) - G10-1 (E) P - W-B LIN Communication line Ignition switch on (IG) Pulse generation

      Tech Tips

      If the result is not as specified, the motor may be malfunctioning.

  3. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) [w/ Sliding Roof]

    A017DNSE04

    1. Disconnect the Q12 ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      Q12-1 (B) - Q12-2 (E) B - W-B Battery power supply Always 11 to 14 V
      Q12-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

      Tech Tips

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the Q12 ECU connector.

    4. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      Q12-4 (MPX1) - Q12-2 (E) P - W-B LIN Communication line Ignition switch on (IG) Pulse generation

      Tech Tips

      If the result is not as specified, the ECU may be malfunctioning.

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) [w/ Smart Entry and Start System]

    A017DQOE12

    1. Disconnect the D36 ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      D36-1 (+B) - D36-17 (E) B - B Battery power supply Always 10 to 14 V
      D36-17 (E) - Body ground B - Body ground Ground Always Below 1 Ω

      Tech Tips

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D36 ECU connector.

    4. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      D36-10 (LIN) - D36-17 (E) L - B LIN Communication line Ignition switch on (IG) Pulse generation
      D36-18 (IG) - D36-17 (E) G - B Power supply Ignition switch on (IG) 10 to 14 V
      D36-18 (IG) - D36-17 (E) G - B Power supply Ignition switch off Below 1 Ω

      Tech Tips

      If the result is not as specified, the ECU may be malfunctioning.

  5. CHECK ID CODE BOX (IMMOBILISER CODE ECU) [w/ Smart Entry and Start System]

    A017B06E02

    1. Disconnect the D28 ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      D28-1 (+B) - D28-8 (GND) W - V Battery power supply Always 11 to 14 V
      D28-8 (GND) - Body ground V - Body ground Ground Always Below 1 Ω

      Tech Tips

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D28 ECU connector.

    4. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      D28-3 (LIN1) - D28-8 (GND) LG - V LIN Communication line Ignition switch on (IG) Pulse generation

      Tech Tips

      If the result is not as specified, the ECU may be malfunctioning.

  6. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) [w/ Smart Entry and Start System]

    A017DG3E11

    1. Disconnect the D10 ECU connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      D10-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D10-6 (IG2) - D10-1 (GND) V - W-B Power supply Ignition switch on (IG) 10 to 14 V
      D10-6 (IG2) - D10-1 (GND) V - W-B Power supply Ignition switch off Below 1 Ω
      D10-7 (B) - D10-1 (GND) G - W-B Battery power supply Always 10 to 14 V

      Tech Tips

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D10 ECU connector.

    4. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      D10-5 (LIN) - D10-1 (GND) GR - W-B LIN Communication line Ignition switch on (IG) Pulse generation

      Tech Tips

      If the result is not as specified, the ECU may be malfunctioning.